SOLUTION: how do you solve and check the following problems using the substition method? y=5x 2x+y=28

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Question 173838: how do you solve and check the following problems using the substition method?
y=5x
2x+y=28
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.y=5x
2.2x%2By=28
Directly substitute eq. 1 into eq. 2,
2.2x%2By=28
2x%2B%285x%29=28
7x=28
x=4
From eq. 1,
1.y=5x
y=5%284%29
y=20
The solution is x=4, y=20.
To check the solution, plug the solution into the equations.
1.y=5x
20=4%285%29
20=20
True.
2.2x%2By=28
2%284%29%2B20=28
8%2B20=28
28=28
True.
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The solutions led to true statements.
They are good solutions.
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x=4
y=20